f6bc65a3b2
Added check for terminator CIE/FDE which has zero data size.
void EHOutputSection<ELFT>::addSectionAux(
...
// If CIE/FDE data length is zero then Length is 4, this
// shall be considered a terminator and processing shall end.
if (Length == 4)
break;
...
After this "Bug 25923 - lld/ELF2 linked application crashes if exceptions were used." is fixed for me. Self link of clang also works.
Initial commit message:
[ELF] - implemented --eh-frame-hdr command line option.
--eh-frame-hdr
Request creation of ".eh_frame_hdr" section and ELF "PT_GNU_EH_FRAME" segment header.
Both gold and the GNU linker support an option --eh-frame-hdr which tell them to construct a header for all the .eh_frame sections. This header is placed in a section named .eh_frame_hdr and also in a PT_GNU_EH_FRAME segment. At runtime the unwinder can find all the PT_GNU_EH_FRAME segments by calling dl_iterate_phdr.
This section contains a lookup table for quick binary search of FDEs.
Detailed info can be found here:
http://www.airs.com/blog/archives/462
Differential revision: http://reviews.llvm.org/D15712
llvm-svn: 257889
92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
//===- Config.h -------------------------------------------------*- C++ -*-===//
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//
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// The LLVM Linker
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_ELF_CONFIG_H
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#define LLD_ELF_CONFIG_H
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#include "llvm/ADT/MapVector.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/ELF.h"
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#include <vector>
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namespace lld {
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namespace elf2 {
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class InputFile;
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class SymbolBody;
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enum ELFKind {
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ELFNoneKind,
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ELF32LEKind,
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ELF32BEKind,
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ELF64LEKind,
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ELF64BEKind
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};
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// This struct contains the global configuration for the linker.
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// Most fields are direct mapping from the command line options
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// and such fields have the same name as the corresponding options.
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// Most fields are initialized by the driver.
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struct Configuration {
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SymbolBody *EntrySym = nullptr;
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SymbolBody *MipsGpDisp = nullptr;
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InputFile *FirstElf = nullptr;
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llvm::StringRef DynamicLinker;
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llvm::StringRef Entry;
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llvm::StringRef Emulation;
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llvm::StringRef Fini;
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llvm::StringRef Init;
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llvm::StringRef OutputFile;
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llvm::StringRef SoName;
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llvm::StringRef Sysroot;
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std::string RPath;
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llvm::MapVector<llvm::StringRef, std::vector<llvm::StringRef>> OutputSections;
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std::vector<llvm::StringRef> SearchPaths;
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std::vector<llvm::StringRef> Undefined;
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bool AllowMultipleDefinition;
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bool AsNeeded = false;
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bool Bsymbolic;
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bool Demangle = true;
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bool DiscardAll;
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bool DiscardLocals;
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bool DiscardNone;
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bool EhFrameHdr;
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bool EnableNewDtags;
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bool ExportDynamic;
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bool GcSections;
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bool GnuHash = false;
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bool Mips64EL = false;
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bool NoInhibitExec;
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bool NoUndefined;
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bool PrintGcSections;
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bool Shared;
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bool Static = false;
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bool StripAll;
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bool SysvHash = true;
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bool Verbose;
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bool ZExecStack;
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bool ZNodelete;
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bool ZNow;
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bool ZOrigin;
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bool ZRelro;
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ELFKind EKind = ELFNoneKind;
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uint16_t EMachine = llvm::ELF::EM_NONE;
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uint64_t EntryAddr = -1;
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unsigned Optimize = 0;
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};
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// The only instance of Configuration struct.
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extern Configuration *Config;
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} // namespace elf2
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} // namespace lld
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#endif
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